A smart power station management method for dual-fuel ships

Abstract

The present invention relates to the technical field of dual-fuel ship management, and discloses a smart power station management method for dual-fuel ships, which determines the rotation speed of the dual-fuel main engine of the ship, classifies the ship status according to the rotation speed of the dual-fuel main engine of the ship, and then provides different power consumption or power storage scheduling methods for the shaft generator, the No. 1 dual-fuel generator, the No. 2 dual-fuel generator, the energy storage battery, and the high-voltage shore power on the shore. During the power consumption or power storage process, the status of each power supply equipment is collected, analyzed and calculated, and the management personnel are notified in time to issue an early warning when an early warning is needed. The method divides the speed of the dual-fuel main engine of the ship into four states: high speed range, medium speed range, low speed range, and shutdown, and corresponds to the four typical operating conditions of the ship's sea voyage, leaving the port, loading and unloading, and in the port, to optimize the overall power of the ship, so as to meet the power scheduling when various operating conditions change.

Description

Technical Field

[0001] The present invention relates to the technical field of dual-fuel ship management, and in particular to an intelligent power station management method for a dual-fuel ship. Background Art

[0002] The existing power station management system is a conventional distribution management system built based on generators (or shaft-belt generators), transformers, distribution boards, etc. Due to the relatively simple system structure, it only performs simple automatic management functions such as standby start and stop, load transfer, and load balancing, and cannot meet the needs of power scheduling when various operating conditions change. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In view of the shortcomings of the prior art, the present invention provides an intelligent power station management method for dual-fuel ships, which has the advantages of giving priority to the use of clean energy, timely dispatching power from various power sources and accurately allocating it, thereby solving the above-mentioned technical problems.

[0005] (II) Technical solution

[0006] To achieve the above object, the present invention provides the following technical solution: a smart power station management method for a dual-fuel ship, comprising the following steps:

[0007] S1. Determine the rotation speed of the dual-fuel main engine of the ship, and classify the ship status according to the rotation speed of the dual-fuel main engine of the ship. The ship status includes four states: sailing at sea, leaving the port, loading and unloading, and in port;

[0008] S2, according to the four states classified in step S1, different power consumption or power storage scheduling modes are respectively given to the shaft generator, the No. 1 dual-fuel generator, the No. 2 dual-fuel generator, the energy storage battery, and the high-voltage shore power on the shore;

[0009] S3. During the process of electricity consumption or storage, the status of the shaft generator, No. 1 dual-fuel generator, No. 2 dual-fuel generator, energy storage battery and high-voltage shore power are collected, analyzed and calculated, and it is determined one by one whether to issue an early warning. When an early warning is needed, the management personnel will be notified in time to issue an early warning.

[0010] As a preferred technical solution of the present invention, the process of classifying the ship status according to the rotation speed of the dual-fuel main engine of the ship in step S1 is as follows:

[0011] S1.1. The speed of the dual-fuel main engine of the ship at the current moment to collect;

[0012] S1.2. Increase the speed of the ship's dual-fuel main engine Enter the speed judgment function The specific speed judgment function is expressed as follows:

[0013] in, Indicates the unit of speed. Indicates the speed of the dual-fuel main engine of the ship at the current moment. When the speed judgment function When the output is high speed or medium speed, the ship is judged to be in sea sailing state. When the output is low speed, the ship is judged to be in the state of leaving the port. When the output is shutdown, it is determined that the ship is in loading or unloading or in port.

[0014] As a preferred technical solution of the present invention, the scheduling steps for the marine navigation status in step S2 are as follows:

[0015] S2a.1, read the speed of the dual-fuel main engine of the current ship, and determine whether it is high speed. If not, execute step S2a.2; if it is high speed, execute step S2a.3;

[0016] S2a.2, the shaft generator operates at reduced load, and determines whether the shaft generator meets the load requirement. If so, execute step S2a.4; if not, execute step S2a.5;

[0017] S2a.3, the shaft generator enters the rated output condition and distributes the excess power to the energy storage battery for charging;

[0018] S2a.4, setting the energy storage battery and the No. 1 dual-fuel generator as the first backup power source and the second backup power source in sequence;

[0019] S2a.5. Connect the energy storage battery to the grid and determine whether the supplied power meets the load demand. If so, set the No. 1 dual-fuel generator and the No. 2 dual-fuel generator as the first backup power supply and the second backup power supply respectively. If still not, connect the No. 1 dual-fuel generator and connect it to the grid for power supply, and set the No. 2 dual-fuel generator as the backup power supply.

[0020] As a preferred technical solution of the present invention, the scheduling steps for the departure and berthing status in step S2 are as follows:

[0021] S2b.1, the No. 1 dual-fuel generator is running, and it is determined whether there is excess power. If so, the excess power is allocated to the energy storage battery for charging. If not, it is determined whether the load of the No. 1 dual-fuel generator meets the demand. If so, continue to execute step S2b.1, if not, execute step S2b.2;

[0022] S2b.2. Connect the energy storage battery to the grid and set the No. 2 dual-fuel generator as the backup power source.

[0023] As a preferred technical solution of the present invention, the judgment process of loading and unloading and being in port in step S2 is: when the speed judgment function output is shutdown, the load in the current ship is judged. If the load in the current ship is in the range of 900kW~1200kW, it is judged as high load, and the current state is output as loading and unloading state. If the current load is lower than 900kW, the current state is output as being in port state.

[0024] As a preferred technical solution of the present invention, the steps for scheduling the loading and unloading status in step S2 are as follows:

[0025] S2c.1. The ship connects to the high-voltage shore power on the shore. If the connection fails, the No. 1 dual-fuel generator is operated and it is determined whether there is excess power. If there is, the excess power is allocated to the energy storage battery for charging. If not, the energy storage battery is connected to the grid for power supply, and the No. 2 dual-fuel generator is set as a backup power supply. If the connection is successful, step S2c.2 is executed;

[0026] S2c.2. Charge the energy storage battery through high-voltage shore power, and set the No. 1 dual-fuel generator and the energy storage battery as the first backup power supply and the second backup power supply respectively.

[0027] As a preferred technical solution of the present invention, the scheduling steps of the port status in step S2 are as follows:

[0028] S2d.1. The ship is connected to the high-voltage shore power on the shore. If the connection fails, the ship is powered by the energy storage battery. At the same time, the No. 1 dual-fuel generator and the No. 2 dual-fuel generator are set as the first backup power supply and the second backup power supply respectively. If the connection is successful, step S2d.2 is executed;

[0029] S2d.2. Power the ship with high-voltage shore power and charge the energy storage battery. At the same time, the energy storage battery and the No. 1 dual-fuel generator are set as the first backup power supply and the second backup power supply in sequence.

[0030] As a preferred technical solution of the present invention, the specific calculation expression for determining whether there is excess electricity in step S2b.1 is as follows:

[0031] in, Indicates the remaining power. The current power supply is Indicates the power required by the current i-th device, A collection of facilities that currently require electricity The comprehensive power consumption When When , it indicates that there is no remaining power to charge the energy storage battery, and the load cannot meet the demand, and additional power supply is required.

[0032] As a preferred technical solution of the present invention, the data expression collected for the status of the shaft generator, the first dual-fuel generator, the second dual-fuel generator and the energy storage battery in step S3 is as follows:

[0033] in, Represents the state data set, Respectively represent the operating temperatures of the shaft generator, No. 1 dual-fuel generator, No. 2 dual-fuel generator, energy storage battery and high-voltage shore power. They represent the output power of the shaft generator, No. 1 dual-fuel generator, No. 2 dual-fuel generator, energy storage battery and high-voltage shore power respectively.

[0034] As a preferred technical solution of the present invention, the specific expression for early warning of the status of the shaft generator, the first dual-fuel generator, the second dual-fuel generator and the energy storage battery in step S3 is as follows:

[0035] , in, Represents the state data set Substitute the working temperature in into the calculation, Represents the current state data set Any temperature data, Indicates the corresponding The temperature threshold, Represents the state data set Substitute the output power in into the calculation, Represents the current state data set Any output power data, Indicates the corresponding Rated power.

[0036] Compared with the prior art, the present invention provides a smart power station management method for dual-fuel ships, which has the following beneficial effects:

[0037] 1. The present invention divides the speed of the dual-fuel main engine of the ship into four states: high speed range, medium speed range, low speed range and shutdown, and optimizes the scheduling of the ship's power grid power in accordance with the four typical operating conditions of the ship's sea voyage, leaving the port, loading and unloading, and being in the port, so that green energy can be used preferentially in all working conditions of the ship, so that the ship's emissions can be minimized or zeroed.

[0038] 2. The present invention collects and calculates the status of the shaft generator, the first dual-fuel generator, the second dual-fuel generator and the energy storage battery, thereby determining whether the shaft generator, the first dual-fuel generator, the second dual-fuel generator and the energy storage battery need an early warning during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is an overall schematic diagram of the present invention;

[0040] Figure 2 It is a schematic diagram of the process of the present invention. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figure 1-Figure 2 , a smart power station management method for a dual-fuel ship, the smart power station includes the management allocation of the following contents;

[0043] 1. Dual-fuel main engine, used to generate and output power, and transmit the power to the propeller through the shaft system assembly, ultimately forming propulsion power;

[0044] 2. The shaft generator is installed on the shaft assembly of the dual-fuel main engine. The shaft assembly drives the shaft generator to generate electricity and provide backup power to the marine load. The shaft generator can be used as a clean energy source and can also be used as an electric motor to assist in driving the propeller to rotate;

[0045] 3. Dual-fuel generators. SOLAS (International Convention for the Safety of Life at Sea) requires that ships sailing at sea must be equipped with two fuel generators as the main power source. When the shaft generator, energy storage battery or shore power cannot supply power normally, the dual-fuel generator must be able to start at any time and supply power to the grid.

[0046] 4. The energy storage battery system, as a clean energy source, can provide short-term backup power for the ship at any time.

[0047] 5. High-voltage shore power, used to connect to the high-voltage shore power at the dock to provide clean energy for ships when docked;

[0048] Its management includes the following steps:

[0049] The present invention uses these four states and the corresponding four working conditions as the most typical cases for explanation, which can be further subdivided when implementing a specific project, and is not limited to this solution;

[0050] S1. Determine the rotation speed of the dual-fuel main engine of the ship, and classify the ship status according to the rotation speed of the dual-fuel main engine of the ship. The ship status includes four states: sailing at sea, leaving the port, loading and unloading, and in port;

[0051] S2, according to the four states classified in step S1, different power consumption or power storage scheduling modes are respectively given to the shaft generator, the No. 1 dual-fuel generator, the No. 2 dual-fuel generator, the energy storage battery, and the high-voltage shore power on the shore;

[0052] S3. During the process of electricity consumption or storage, the status of the shaft generator, No. 1 dual-fuel generator, No. 2 dual-fuel generator, energy storage battery and high-voltage shore power is collected, analyzed and calculated, and it is determined whether to issue an early warning one by one. When an early warning is needed, the management personnel are notified in time to issue an early warning;

[0053] The data expression collected for the status of the shaft generator, the first dual-fuel generator, the second dual-fuel generator and the energy storage battery in step S3 is as follows:

[0054] in, Represents the state data set, Respectively represent the operating temperatures of the shaft generator, No. 1 dual-fuel generator, No. 2 dual-fuel generator, energy storage battery and high-voltage shore power. Respectively represent the output power of the shaft generator, No. 1 dual-fuel generator, No. 2 dual-fuel generator, energy storage battery and high-voltage shore power;

[0055] The present invention divides the rotation speed of the dual-fuel main engine of the ship into four states: high speed range, medium speed range, low speed range and shutdown, and optimizes the overall power consumption of the ship in accordance with the four typical operating conditions of the ship sailing at sea, leaving the port, loading and unloading, and being in the port, so as to meet the power scheduling when various operating conditions change.

[0056] The specific expression for early warning of the status of the shaft generator, the first dual-fuel generator, the second dual-fuel generator and the energy storage battery in step S3 is as follows:

[0057] , in, Represents the state data set Substitute the working temperature in into the calculation, Represents the current state data set Any temperature data, Indicates the corresponding The temperature threshold, Represents the state data set Substitute the output power in into the calculation, Represents the current state data set Any output power data, Indicates the corresponding The rated power of the warning is as follows: No warning is given when or No warning is issued in the following cases; warnings are issued in all other cases.

[0058] Furthermore, the process of classifying the ship status according to the rotation speed of the dual-fuel main engine of the ship in step S1 is as follows:

[0059] S1.1. The speed of the dual-fuel main engine of the ship at the current moment to collect;

[0060] S1.2. Increase the speed of the ship's dual-fuel main engine Enter the speed judgment function The specific speed judgment function is expressed as follows:

[0061] in, Indicates the unit of speed. Indicates the speed of the dual-fuel main engine of the ship at the current moment. When the speed judgment function When the output is high speed or medium speed, the ship is judged to be in sea sailing state. When the output is low speed, the ship is judged to be in the state of leaving the port. When the output is stopped, it is judged that the ship is loading or unloading or in port, and is not limited to the setting of this speed range.

[0062] Furthermore, the scheduling steps for the marine navigation status in step S2 are as follows:

[0063] S2a.1, read the speed of the dual-fuel main engine of the current ship, and determine whether it is high speed. If not, execute step S2a.2; if it is high speed, execute step S2a.3;

[0064] S2a.2, the shaft generator operates at reduced load, and determines whether the shaft generator meets the load requirement. If so, execute step S2a.4; if not, execute step S2a.5;

[0065] S2a.3, the shaft generator enters the rated output condition and distributes the excess power to the energy storage battery for charging;

[0066] S2a.4, setting the energy storage battery and the No. 1 dual-fuel generator as the first backup power source and the second backup power source in sequence;

[0067] S2a.5. Connect the energy storage battery to the grid and determine whether the supplied power meets the load demand. If so, set the No. 1 dual-fuel generator and the No. 2 dual-fuel generator as the first backup power supply and the second backup power supply respectively. If still not, connect the No. 1 dual-fuel generator and connect it to the grid for power supply, and set the No. 2 dual-fuel generator as the backup power supply.

[0068] Furthermore, the scheduling steps for the departure and berthing status in step S2 are as follows:

[0069] S2b.1, the No. 1 dual-fuel generator is running, and it is determined whether there is excess power. If so, the excess power is allocated to the energy storage battery for charging. If not, it is determined whether the load of the No. 1 dual-fuel generator meets the demand. If so, continue to execute step S2b.1, if not, execute step S2b.2;

[0070] S2b.2. Connect the energy storage battery to the grid and set the No. 2 dual-fuel generator as the backup power source.

[0071] Furthermore, the judgment process for loading and unloading and being in port in step S2 is as follows: when the speed judgment function outputs shutdown, the load in the current ship is judged. If the load in the current ship is in the range of 900kW~1200kW, it is judged as high load, and the current state is output as loading and unloading state. If the current load is lower than 900kW, the current state is output as being in port state.

[0072] Furthermore, the steps for scheduling the loading and unloading status in step S2 are as follows:

[0073] S2c.1. The ship connects to the high-voltage shore power on the shore. If the connection fails, the No. 1 dual-fuel generator is operated and it is determined whether there is excess power. If there is, the excess power is allocated to the energy storage battery for charging. If not, the energy storage battery is connected to the grid for power supply, and the No. 2 dual-fuel generator is set as a backup power supply. If the connection is successful, step S2c.2 is executed;

[0074] S2c.2. Charge the energy storage battery through high-voltage shore power, and set the No. 1 dual-fuel generator and the energy storage battery as the first backup power supply and the second backup power supply respectively.

[0075] Furthermore, the scheduling steps of the in-port state in step S2 are as follows:

[0076] S2d.1. The ship is connected to the high-voltage shore power on the shore. If the connection fails, the ship is powered by the energy storage battery. At the same time, the No. 1 dual-fuel generator and the No. 2 dual-fuel generator are set as the first backup power supply and the second backup power supply respectively. If the connection is successful, step S2d.2 is executed;

[0077] S2d.2. Power the ship with high-voltage shore power and charge the energy storage battery. At the same time, the energy storage battery and the No. 1 dual-fuel generator are set as the first backup power supply and the second backup power supply in sequence.

[0078] Furthermore, the specific calculation expression for determining whether there is excess power in step S2b.1 is as follows:

[0079] in, Indicates the remaining power. The current power supply is Indicates the power required by the current i-th device, A collection of facilities that currently require electricity The comprehensive power consumption When When , it indicates that there is no remaining power to charge the energy storage battery, and the load cannot meet the demand, and additional power supply is required.

[0080] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A smart power station management method for a dual-fuel ship, characterized in that: The following steps are involved: S1. Determine the rotation speed of the dual-fuel main engine of the ship, and classify the ship status according to the rotation speed of the dual-fuel main engine of the ship. The ship status includes four states: sailing at sea, leaving the port, loading and unloading, and in port; S2, according to the four states classified in step S1, different power consumption or power storage scheduling modes are respectively given to the shaft generator, the first dual-fuel generator, the second dual-fuel generator, the energy storage battery, and the high-voltage shore power on the shore; The process of classifying the ship status according to the rotation speed of the dual-fuel main engine of the ship in step S1 is as follows: S1.

1. The speed of the dual-fuel main engine of the ship at the current moment to collect; S1.

2. Increase the speed of the ship's dual-fuel main engine Enter the speed judgment function The specific speed judgment function is expressed as follows: ;in, Indicates the unit of speed. Indicates the speed of the dual-fuel main engine of the ship at the current moment. When the speed judgment function When the output is high speed or medium speed, the ship is judged to be in sea sailing state. When the output is low speed, the ship is judged to be in the state of leaving the port. When the output is shutdown, it is determined that the ship is in loading or unloading or in port; the scheduling steps for the sea navigation status in step S2 are as follows: S2a.1, read the speed of the dual-fuel main engine of the current ship, and determine whether it is high speed. If not, execute step S2a.2; if it is high speed, execute step S2a.3; S2a.2, the shaft generator operates at reduced load, and determines whether the shaft generator meets the load requirement. If so, execute step S2a.4; if not, execute step S2a.5; S2a.3, the shaft generator enters the rated output condition and distributes the excess power to the energy storage battery for charging; S2a.4, setting the energy storage battery and the No. 1 dual-fuel generator as the first backup power source and the second backup power source in sequence; S2a.5, connect the energy storage battery and connect to the grid for power supply, and determine whether the supplied power meets the load demand. If so, set the No. 1 dual-fuel generator and the No. 2 dual-fuel generator as the first backup power supply and the second backup power supply in sequence. If still not, connect the No. 1 dual-fuel generator and connect to the grid for power supply, and set the No. 2 dual-fuel generator as the backup power supply. The scheduling steps for the departure from the port in step S2 are as follows: S2b.1, the No. 1 dual-fuel generator is running, and it is determined whether there is excess power. If so, the excess power is allocated to the energy storage battery for charging. If not, it is determined whether the load of the No. 1 dual-fuel generator meets the demand. If so, continue to execute step S2b.1, if not, execute step S2b.2; S2b.2, connect the energy storage battery and grid power supply, set the No. 2 dual-fuel generator as the backup power supply; the judgment process of loading and unloading and being in port in step S2 is: when the speed judgment function output is shutdown, the current load in the ship is judged. If the current load in the ship is in the range of 900kW~1200kW, it is judged as high load, and the current state is output as loading and unloading state. If the current load is less than 900kW, the current state is output as being in port state; the scheduling steps for loading and unloading state in step S2 are as follows: S2c.

1. The ship connects to the high-voltage shore power on the shore. If the connection fails, the No. 1 dual-fuel generator is operated and it is determined whether there is excess power. If there is, the excess power is allocated to the energy storage battery for charging. If not, the energy storage battery is connected to the grid for power supply, and the No. 2 dual-fuel generator is set as a backup power supply. If the connection is successful, step S2c.2 is executed; S2c.2, charging the energy storage battery through high-voltage shore power, and setting the No. 1 dual-fuel generator and the energy storage battery as the first backup power supply and the second backup power supply in sequence; the scheduling steps for the port status in step S2 are as follows: S2d.

1. The ship is connected to the high-voltage shore power on the shore. If the connection fails, the ship is powered by the energy storage battery. At the same time, the No. 1 dual-fuel generator and the No. 2 dual-fuel generator are set as the first backup power supply and the second backup power supply respectively. If the connection is successful, step S2d.2 is executed; S2d.2, supply power to the ship through high-voltage shore power and charge the energy storage battery, and set the energy storage battery and the No. 1 dual-fuel generator as the first backup power supply and the second backup power supply in sequence; S3. During the process of electricity consumption or storage, the status of the shaft generator, No. 1 dual-fuel generator, No. 2 dual-fuel generator, energy storage battery and high-voltage shore power are collected, analyzed and calculated, and it is determined one by one whether to issue an early warning. When an early warning is needed, the management personnel will be notified in time to issue an early warning.

2. The intelligent power station management method for a dual-fuel ship according to claim 1, characterized in that: The specific calculation expression for determining whether there is excess power in step S2b.1 is as follows: ;in, Indicates the remaining power. The current power supply is Indicates the power required by the current i-th device, A collection of facilities that currently require electricity The comprehensive power consumption When When , it indicates that there is no remaining power to charge the energy storage battery, and the load cannot meet the demand, and additional power supply is required.

3. The intelligent power station management method for a dual-fuel ship according to claim 2, characterized in that: The data expression collected for the status of the shaft generator, the first dual-fuel generator, the second dual-fuel generator and the energy storage battery in step S3 is as follows: ;in, Represents the state data set, Respectively represent the operating temperatures of the shaft generator, No. 1 dual-fuel generator, No. 2 dual-fuel generator, energy storage battery and high-voltage shore power. They represent the output power of the shaft generator, No. 1 dual-fuel generator, No. 2 dual-fuel generator, energy storage battery and high-voltage shore power respectively.

4. The intelligent power station management method for a dual-fuel ship according to claim 3 is characterized in that: The specific expression for early warning of the status of the shaft generator, the first dual-fuel generator, the second dual-fuel generator and the energy storage battery in step S3 is as follows: , ;in, Represents the state data set Substitute the working temperature in into the calculation, Represents the current state data set Any temperature data, Indicates the corresponding The temperature threshold, Represents the state data set Substitute the output power in into the calculation, Represents the current state data set Any output power data, Indicates the corresponding Rated power.

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